116
VCCX2 Controller Technical Guide
BACnet
®
Properties for the VCCX2 Controller
Parameter
Object
Description
Limits
Application
Software
Version
AI: 1
Current version of the
software in the unit
Control Mode
AI: 2
Configured unit
application
See Control Mode
Bits on page 131.
Control Status
AI: 3
Current Occupied/
Unoccupied Status
See Control Status
Bits on page 131.
Hvac Mode
AI: 4
Current operational status
See HVAC Mode
Bits on page 131.
Control
Temperature
AI: 5
Current value of the
Control Temperature Sensor
Mode
Cooling
Setpoint
AI: 6
Cooling Mode Enable
Setpoint Mirror (adjusted
by the Space Sensor Slide
adjustment and/or Night
Setback offsets)
Mode
Heating
Setpoint
AI: 7
Heating Mode Enable
Setpoint Mirror (adjusted
by the Space Sensor Slide
adjustment and/or Night
Setback offsets)
Sensor Slide
Adjust Effect
AI: 8
Amount of Current Sensor
Slide Adjust
Supply Air
Temperature
AI: 9
Current value of the
Supply Air
Temperature sensor
Supply Air
Setpoint
AI: 10
Current SAT Cooling or
Heating Setpoint if there is
no reset source; Current
calculated SAT setpoint
with Reset Source
Controlling
Coil Temp
Setpoint
AI: 11
This is the current
calculated Coil Suction
Temperature target during
Dehumidification Mode
Space
Temperature
AI: 12
Current value of the Space
Temperature Sensor
Space
Humidity
AI: 13
Current value of the Space
Humidity
Return Air
Temperature
AI: 14
Current value of the
Return Temperature Sensor
Return Air
Humidity
AI: 15
Current value of the Return
Air Humidity
Outdoor Air
Temperature
AI: 16
Current value of the
Outdoor Air
Temperature Sensor
Outdoor Air
Humidity
AI: 17
Current value of the
Outdoor Humidity Sensor
Outdoor Air
Wetbulb
AI: 18
Current calculated
Outdoor Wetbulb
Temperature
BACnet
®
Properties for the VCCX2 Controller
Parameter
Object
Description
Limits
Outdoor Air
Dewpoint
AI: 19
Current Calculated Outdoor
Air Dewpoint Temperature
Supply Air
Setpoint
Reset Voltage
AI: 20
Supply Air Temp Setpoint
Reset Input Signal
Duct Static
Pressure
AI: 21
Current Duct Static
Pressure
Duct Static
Control
Signal
AI: 22
Current Duct Static
Control Signal (Fan VFD)
Building
Pressure
AI: 23
Current value of the
Building Pressure Sensor
Building
Pressure
Control Signal
AI: 24
Current Building Pressure
Control Signal
Outdoor
Airflow
AI: 25
Current Outdoor Airflow
Measurement
Supply
Airflow
AI: 26
Current Supply Airflow
Measurement
Return
Airflow
AI: 27
Current Return Airflow
Measurement
Exhaust
Airflow
AI: 28
Current Exhaust
Airflow Measurement
Carbon
Dioxide
AI: 29
Current Indoor
CO
2
Level
Desired
Economizer
Position
AI: 30
Current Modulating Signal
to the Economizer Damper
Economizer
Feedback
Position
AI: 31
Title 24 current position of
feedback from
Economizer actuator
Return
Damper
Position
AI: 32
Current Signal to the
Return Air Damper if
using Return Air Bypass
Return
Bypass
Position
AI: 33
Current Signal to the
Return Air Bypass Damper
if using Return Air Bypass
Modulating
Cooling
Position
AI: 34
Current percentage of the
Modulating Chilled Water
Signal
Modulating
Heat Position
AI: 35
Current percentage of the
Modulating Heating signal
(Hot Water or SCR heat)
Preheater
Leaving Air
Temp #1
AI: 36
Current Preheater
Leaving Air
Temperature #1
Preheater
Leaving Air
Temp #2
AI: 37
Current Preheater
Leaving Air
Temperature #2
Preheater
Entering Air
Temp
AI: 38
Current Entering Air Temp
for Preheater
Preheater
Setpoint
Reset Voltage
AI: 39
Current Voltage Reset Input
Value for Preheater
NOTE:
Objects labeled AI and BI are read-only. Objects
labeled AV are read/write. The only sensor values
that can be written to are AV points 72 and 73 and
76 through 79.
APPENDIX C - VCCX2 BACnet
®
VCCX2 BACnet
®
Parameters